a) Show, starting with the First Law of Thermodynamics for a closed system, that, at constant pressure, the following fo

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A Show Starting With The First Law Of Thermodynamics For A Closed System That At Constant Pressure The Following Fo 1 (50.49 KiB) Viewed 61 times

a) Show, starting with the First Law of Thermodynamics for a closed system, that, at constant pressure, the following form of the First Law is applicable to a closed system, AH=QH-W₂ where AH is the enthalpy change, QH is the heat energy supplied to the system and W, is the non-pV work done by the system. [20%] (b) A piston/cylinder system contains 10 kg of a wet steam mixture with a quality of 10.5% at a pressure of 5.00 bar. Using the following extract from steam Tables determine the specific enthalpy of the wet steam mixture in the system. [20%] (c) If 21.52 MJ is added as heat, and the pressure within the piston remains at 5.00 bar, what will be the final state of the system, i.e. what is the final temperature and what phase(s) will be present? [30%] (d) What are the volumes occupied by steam/water mixture described in (b), and the final volume of the system after the 21.52 MJ of heat has been added? [10%] (e) Determine the amount of pV work done by the system using (i) the volume change in the system and (ii) the internal energy change for the system. [20%]